Convert an integer between binary, octal, decimal, hexadecimal — and any base from 2 to 36. Powered by exact big-integer math, so arbitrarily large numbers convert perfectly. Everything runs entirely in your browser.
Accepts a leading - for negatives. Prefixes like 0x, 0o, 0b and grouping spaces are ignored automatically.
Digits use 0–9 then A–Z (A = 10 … Z = 35). Base 36 is the maximum.